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(No Model.)

J. F. PLAGE..

LAMP.

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N. PETERS. Pholu-Lmugnpher, Wnsllngwn. (LICv UNITED STATES PATENT OFFICE.

JAMES F. PLACE, OF MONTCLAIR, NEWA JERSEY, ASSIGNOR TO HOLMES, BOOTH & HAYDENS, OF NEV YORK, N. Y.

LAMP.

SPECIFICATION forming part of Letters Patent No. 422,537, dated March 4, 1890.

Application filed June 14, 1889. Serial No. 314,203. (No model.)

To @ZZ whom it may concern: v

Be it known that I, JAMES F. PLACE, a citizen of the United States, and a resident of Montclair, Essex county, New Jersey, have invented certain Improvements in Lamps, of which the following` is a specification.

My invention relates to central-draft lamps; and the object of my invention is, in part, to provide a telescopic stem for the lamp,where by the reservoir and the burner thereon may be raised or lowered. and iixed at any height desired, and in part to improve the wick-operating mechanism.

My invention will be fully described hereinafter, and its novel `jreatures carefully defined in the claims.

In the accompanying drawings, illustrative of my invention, Figure l is a vertical axial section, on a small scale, of a central-draft lamp embodying my improvements. Figs. 2 and 3 are detached sectional views on a scale double that of Fig. 1, illustrative of the construction and operation of the clamping device. The plane in which these sections are taken is indicated by the line 2-3 in Fig. l.

Figs. l and Il are views on a scale double thatof Fig. 1, illustrating theconstruction of the wick-controlling device. The plane in which the section, Fig. 4, is taken is indicated by the line 4in Fig. 1. Figs. 5 and 6 illusT trate modiiied constructions that will behereinafter described.

Inthe ordinary central-draft lamp the body or reservoir of the lamp is fixed to the stem, which latter rises from the foot or base, 1'

and the burner is Vor course always at the same distance above 'the table upon which the lamp rests. It is well understood by lamp users that this unalterability of the burner or point of illumination is objectionable, and in some classes of table-lamps the reservoir and burner have been made adj ustable on the stem. The main purpose of my present invention is to apply this principle of vertical adjustability to that style of centraldraft stand-lamps wherein the supporting stem,which is usually tubular and forms an airpassage, has its axis aligned with that of the wick-tube; and in carrying out my invention in its simplest form I provide a hollow base or foot a, having apertures a for the admission of air, and mount on this base a tubular stem b, which opens into the hollow of the foot a at its lower end. The reservoir or body c of the lamp is provided with the usual 5 5 central tube d, which is embraced by the tubular wick e. This central tube d, which' forms the passage for the air that provides the lamp with a central draft, opens out at the bottom of the reservoir c and the tubular stem h enters it. The construction of the tubes b and CZ is telescopic, and permits the reservoir to be raised or lowered on the stem to any height desired within limits. Usually this limit will be governed in this manner: When the reservoir is lowered until it rests upon the foot a, the upper end of the stem h will'stand just below the upper end of the central draft-tube d.

In order to clamp the reservoir to the stem b at any height at which it may be set,I pro videthe lamp with a suitable clamping device, which may be constructed in various ways.

I will describe the form of clamp I prefer, which-is automatic, and requires only a moderate pressure of the thumb to release it.

At the base of the reservoir c is an annular casing f, which forms an annular chamber about the tube b, as best seen in Figs. 2 and 3. In this chamber is placed a steel springclamp g, in the nature of a hoop havingiran elliptical or oval form, and adapted normally to embrace and clasp the stem b on opposite sides with' sufficient force to prevent the reservoir from slipping on the stem, as seen in Fig. 2. This elliptical spring is looselyconfined edgewise' in the casing f, and can have no vertical play independently of the reservoir. To the spring g is secured a push-but ton 7L, the stem of which passes through the wall of the casing f. The attachment of the button to the spring is made at the pointl where the oval spring stands olf from the stem h, and opposite to this point of attach- 9 5 ment-namely, at .fr in Figs. 2 and S-the spring bears on or against the wall of the casing f. Fig. 2 shows the spring as clamping on the steln b. W'hen the button 7L is pressed, the loop of the spring g will be expanded, as me `tlared outward, as seen at yg/ in Fig. l.

shown in Fig. 3, assuming more nearly a circular form, and being thus expanded and moved out of contact with the stem Z the reservoir may be moved freely up or down on the stem. As soon as the pressure is removed from the button the spring will again contract and clasp the stem.

I prefer to attach the oval spring to the pushbutton and to leave said spring unattached to the casing, as this mode of construction enables the parts of the lamp to be assembled the more conveniently; but the ordinary skill and judgment of the mechanic will suggest other-equivalent modes of construction.

In order to prevent the user from lifting the reservoir entirely ot from the stem Z), I prefer to make the stem a little less in diameter than the tube d, but of the proper diameter to fit snugly within the aperture in the casing f. After assembling the parts the reservoir is pushed down as far as it will go, and a tool is inserted at the top of the tube d, and the upper end of the tubular stem flanged or This ange serves as a stop, and when the reservoir is lifted until this stop engages the upper margin f of the casingf the reservoir can be lifted no higher. The tube cl rests at its base on the margin f.

The tubular stem b is provided with a bead h', which rests upon the foot a, and its lower extremity passes through an aperture in a disk a2, which forms a part of the toot, and is clinched thereon by flaring its extremity, as shown in Fig. 1.

In a pending application, Serial No. 305,260, filed March 23, 1889, I have set forth a means whereby the lamp may be extinguished by the sudden drawing down of the ignited portionl of the wick within the annular space between the inner and outer wick-tubes. I have shown in the present application another and somewhat simpler device for accomplishing the same result, and this I will now describe with especial reference to Figs. l, 4, and fit.

The tubular wick e is embraced by awickcarrying band e', to which is detachably connected an offset handle ci, attached to the feed-screw t'. This screw is a rod bent into a U form. It passes out through the crown of the reservoir c, and its outer branch passes` down through a partition-tube j, which is secured in the body of the reservoir, thus bringing the adj usting-nut 7c below thereservoir. Se far as above described nothing novel is presented. The tubej projects downwardly from the reservoir, and in it is formed an L- shaped depression or slot Z, (seen in Fig. 4,) which represents in elevation this pendent end of the tube. On the nut k is collared a sleeve Im, which is constructed to slip over and fit on the tube L7. On the inner face of the sleeve m, where it embraces the tube, is a projection n. (Seen in Fig. 4..) This projection is made to engage the slot or depression Z in the tube and form therewith the wellknown bayonet lock or tastenin fr. XVhen the sleeve m is locked tothe tubej, the nut k may be employed in the usual way to'raise and lower the wick through the medium of the screw i; but when the lamp is to be extinguished the operator imparts to the sleeve m a partial rotation in such a way as to disengage the bayonet-fastening, and then draws down the feed-screw as far as it can be drawn by a quick movement. This will extinguish the iiame by drawing the ignited end of the wick suddenly down to an extent sutlicient to deprive it of air. The sleeve m is, or'may be provided with a milled boss m', as shown in Fig. et, to enable it to be turned the more conveniently with the thumb and linger. This form of wick-controlling device is adapted for overhead lamps as well as -for standdamps, owing to the arrangement of the nut 7o below the reservoir. The device illustrated in my pending application, before referred to, is best suited to stand-lamps.

In Fig. 5, vwhich is a sectional View similar to Fig. 2, I have shown another form of clamp to hold the reservoir in place on the stem. In this view b represents the tubular stem, and f the casing for the clamp. A spring-band gx embraces the stem, but does not clamp the stem normally. On the free ends of the bands are two studs which project from the casing f and form a conical split screw g', on which is screwed a nut hx. AWhen this nut is screwed up, it causes the band giX to clamp on the stem l).

In Fig. 6 is illustrated a slight modifica"n tion. In this construction the tubular stem h has a diameter somewhat less than that of the tube d, and a portion of the air which forms the central draft of the lamp passes up between the two tubes, this portion of the air entering at apertures in a casting p, secured. to the lower part of the oilreservoir u.. v The tube d is fixed in this casting and has perforations in it at this point to permit the air to enter it. The clam-p in this construction is formed by slitting the conical extremity px of the casting p, where it embraces the stem b, and forming a screwthread on this conical extremity. On this screw-thread is screwed a. nut q. The slitting of the cone forms springiingers and allows the nut to press these fingers tightly onto the tubular stem.

Having thus described my invention, I claimha l. In a central-draft lamp, the combination of a reservoir having a central draft-flue, a basepiece or pedestal constructed to receive air, and a telescopic tube or pillar interme diate of the base-piecc or pedestal and the reservoir and communicating at one end with the base-piece or pedestal and at the other' with the central draft-tube of the reservoir, substantially as specified.

2. In acentraldraftlamp, the combination, with a lamp comprising a central air-tube and a base, of a pillar constructed to slide IOO Within said air-tube, and a locking device,

substantially as speciiied.

' 3. In a stand-lamp, the combination, with the reservoir and the Wick-tube therein, said tube forming the .air-passage for the central draft, of the foot or base of the lamp, the stern on said foot extending up into said Wicktube and telesooping therewith, and the clamp carried by the reservoir for clamping the latter to the stem.

et. In a lamp, the combination, With the reservoir, the Wick-tube therein, the base or foot,

and the stem telescoping with the Wick-tube, of the casing of the clamp, the elliptical spring therein embracing and normally clasping said stem, and the spring-actuating pushbutton projecting from said casing.

5. In a lamp, the combination, With the ,foot and the tubular stem mounted therein the depending extremity of the partitiontube, substantially as and for the purposes set forth.

,7. In a lamp, the combination, With the reservoir and Wick-tube and the ordinary Wickcarrying hand,the offset handle,the U -shaped feed-screw, the regulating-nut, and the partition-tube, of the sleeve m, collared on the nut and fitting on the projecting end of said partition-tube, the tube and sleeve being pro- 4o vided, respectively, With the elements Which form a bayonet-fastening, as and for the purposes set forth.

8. In a stand-lamp, the combination, with the reservoir and the wick-tube xed there- 45 in, said tube forming the passage for the central draft, of the foot or base of the lamp, the stem on said foot extending up into and telescoping With said Wick-tube, the clamp borne by the reservoir for clamping it fast to said 5o stem, and a stop, substantially as described, on said stein to prevent the removal of the reservoir therefrom.

In Witness whereof l have hereunto signed my name in the presence of two subscribing 55 Witnesses.

JAMES F. PLACE. Witnesses:

r HENRY CONNETT, J. D. CAPLINGER. 

